eBay Volt Amp Meter How to

[@funnyworld5482]

Thanks man for a couple of things #1. No music #2. You actually speak #3. You make it simple enough for any electronics enthusiast to understand and follow instructions. #4. You speak at a normal human pace making things understandable a clear and informative presentation.. Thank you for sharing this. I did subscribe to your video it has value .

[@JCHaywire]

This is exactly what I needed. I would not have gotten this on my own. That booger! Epic. Thank you.

[@DoctorMangler]

Thanks for showing these, I've been planning to install one of these on my boiler control box so I can see the draw and voltage of my transformer at a glance. I'm a service plumber and I work on heating boilers all the time. My #1 check on a service call is to check for proper voltage and current draw at the transformer('s). I wouldn't install this for a customer due to risk exposure, but it would sure be nice on my system. I've also been looking at the round button style due to the fact that they can fit into a knockout without case modification. Thanks again for demonstrating this, you answered some of my questions. I know this was an older video but it still applies today!

[@jeffrobertson1491]

I never would have guessed the hookup for this particular meter. Boy it's screw y. Thanks ever so much for laying it out!

[@g.a.f3398]

Thank you for making this so clear on how to wire this up I've looked at many videos on KZbin on how to wire this up and most of them don't make it clear on how to do it you make understanding it very simple and straight to the point so thank you very much. 😊

[@Elfnetdesigns]

I bought some of these for a custom power panel I built for my RV trailer. For the AC I ordered one of the bigger DIN rail mounted ones like Big Clive reviewed and ordered these smaller ones for the DC side (battery, charger and solar panels) of the system. It all works nicely and I even implemented an arduino based controller that will send data via wifi to my computer or smartphone if a circuit trips or just to stream live power usage..

[@shafi420]

Thank you for making the video. My old meter had 3 heavy wire and 2 thin wire and new one same as yours so wiring it up was a breeze because of you.

[@sami0_0-0]

I saw some videos and by far this was the one that was the most helpful. Thank you🙏

[@3th1xs]

I used your diagram with my meter and it worked out just as it should. Thank you!

[@RickRaulston]

Bought some of these and spent forever looking for videos with info on hooking them up. Never found anything for this style meter. Finally got it to work by trial and error. FINALLY a video on the damn things. I find it ridiculous that the Chinese child labor techs don't include a diagram for their convoluted, commie, mostly fire hazard electronics very often. Maybe it slips their memory with the 16 hour work days and all. I am happy to pay more and buy American whenever practical, or at least from a US supplier I can actually contact. 'Merica

[@lazar2175]

Hey dude, could you help me out, i got the same one but my power supply acts as if current meter is shorted. It turns on a short plus current limit lamp. However, it works just fine with a battery.

[@SteveH-TN]

Thanks again for sharing yet another informative video. I just received 2 of these from Amazon. I just ordered a Longwei 3010KDS bench power supply yesterday . I am designing an Home Electronics workshop for Amateur Radio, Model Railroading & Drone hobbyist. I will be using breadboards with Raspberry Pi & Elegoo Arduino Uno with breadboard power Supplies 3& 5 V. I have subscribed to your KZbin channel and appreciate your efforts in producing quality videos. 73 de AA4S

[@simonhare7369]

Fell foul of one of these only yesterday, big poof of smoke! One side of the ammeter being connected to the 0V of the power in, it has to be wired as you say. I.e. current measurement after the load, referenced to 0V. Totally impractical for the application i purchased it for, which was to keep an eye on in tank fuel pump current draw (the pumps ground wire disappears into the loom to where i don't know). Have wondered if a little 1W isolated dc-dc converter to power the meter would get around this. But surely loosing true 0v reference would lead to no or inaccurate voltage measurements. Great video.

[@mansuryayas]

I got an Exact one and was going bonkers trying to figure how the F*** I was supposed to wire this thing up. Your video is upto the point and got my meter working perfectly. Thanks a lot

[@ka01si09ma]

Usefull tutorial. I just fried 1st panel meter. Going to order another one and will follow showed instructions completely.

[@yambo59]

Hello - I started watching your channel a few weeks back and have subscribed, and now that im old broke and retired and seeing all the great new (cheap!) beginner kits and modules available now, ive decided to start beginner electronics as a hobby with breadboard, stock of cheap asian components, kit build, fresh multimeter collection, etc.-lol-after seeing your AN8008 review I bought it then later the updated AN8009, and wow these little guys have great functionality and accuracy for the money-! The 8009 has some minor changes, temp. function in place of square wave and the addition of the NCV feature among others. I built some kits back in high school many years ago but that was a loong time ago. Anyway, I already know how to solder so my first kit project is the 0 - 30 volt power supply kit you built in a recent video for giveaway, it will make a good basic supply for my beginner benchwork and be a useful item instead of some pointless blinky light siren gadget. The issue im having is I ordered the 0 - 33volt / 3amp red/blue LED display with built in current shunt to monitor both voltage and amperage variation using two upgraded 10K precision ten turn pots to control the power supplies output and show readings on the LED panel - but I wasnt sure this wiring schematic you gave here would be the same for my version of this LED readout. I need a clearer understanding on just how to wire the darn P-Sup and LED panel from a single power source (24 volt transformer) and there are so many variations on the net that dont all wire the same it appears. The 0 - 33 volt / 3A LED display I chose unlike yours does not have the "V" and "A" printed on front right, and it has a built in shunt, one plug with red black and yellow (thin) wires, and the other plug with two (thick) red and black wires. If you can spare the time for an old duffer I would appreciate it, I have a brand new (RIB TR75VA001) 120v / 24 volt / 3.1amp AC power transformer to power the whole thing from one source to hopefully give max available output from the PS. I just want to be able to use this led panel (or one like it) to monitor the power supply kits volt and amp output. I have considered maybe I should have gotten the 100volt/10amp led panel like yours instead-?? Is there a different diagram for my particular situation-? Thanks again so much for any help - - I tried to copy and paste the link to the ebay page I got the display from but YT of course wont allow it.... Thanks again, really liking your videos.

[@georgechambers3197]

I bought one of these some time ago and never got around to using it. Sounds like a new project in the making. Good video.

[@learnelectronics]

George Chambers Thanks

[@dark2light263]

Thanks for your awesome and very helpful video. I couldn't figure out why I could only either get the volt or amp meter to work,but not at the same time. So, you explained why. Thanks again!

[@ozantayar]

I've burned couple of these before figuring out that I have to put amp measuring after the load it would be awesome to find your video before that :) good thing I bought multiple of them

[@oldwrench4213]

And how of them did you smoke? 😁

[@herrakahmy6840]

There is no better way to explain this!! Big thanks, got my meter working with this schema.

[@adailyllama4786]

Thanks! Exactly what I needed to get that little meter working.

[@mrgcav]

Well done. How did you figure this out without instructions ?

[@mohamdazize8953]

thank you very much man you fix on of the my problem for 2 year

[@AKADriver]

One of the things you didn't mention that you did, but that makes a big difference: if you're sharing a supply with the load do NOT hook up the thin black wire. If you do the current reading will be off by about 30%. I was pulling my non-existent hair out trying to figure out why my bench power supply would show 0.20A, and the meter would show 0.27A. If you use it with an independent power supply then you connect red and black thin wires to that.

[@kwilde1447]

Thank you, thank you! I have been frustrated with inconsistencies in different so-called hookups that don't match. My purchase had no instructions.

[@Lucas-vk8fz]

Thank you soo much! I was just about to hook one up and I would never have figured that out in a million years..lol really appreciate you sharing your knowledge.

[@jtonlineshopping2332]

Your video about volt & ammeter is a lifesaver, well done!

[@learnelectronics]

Thanks

[@samTollefson]

Great Video! Question, I am using a single power source for my meter but I want to be able to turn off the meter while leaving the line power on. Do I interrupt the yellow wire for a switch? Thanks

[@PeterMilanovski]

It's been 3 years since this video was posted and you can still find these things on eBay! It's probably a better idea to run it from a separate power supply if possible, I have some of these that I'm planning to use on a project soon, I'm wondering what their power consumption is so that maybe I can figure out a way to power them but not from the load battery. I'm also wondering how much current it could take before going into meltdown, actually I'm going to have a look on eBay for other current sense resistors to replace the one fitted if it's just not enough for what I need it for! Great video!

[@ayis68]

nice video...how adjust the2 pots on back of display or you use it by default?

[@willpitts9957]

The first 5 seconds in you had me, the “Sum Ting Wong” reference was a perfect hook to the video

[@HIDLad001]

I am not sure where that is from, but I am guessing the EEVBlog.

[@mgamga]

Thanks, This episode saved my new meter.

[@TheChaznw]

Trying to hook this up to a small trailer. The negative side of the load is the common ground also hooked to the neg side of the battery. Tried to hook it up like this and maximum smoke.

[@gartmorn]

I have come across this before where people assume red goes to positive and black to negative! One of my friends tried to wire up a light in his attic but wasn't aware of switch wires etc so you can guess the rest! Your friendly electrical fitter (moi) was called out, again! Not the first time either. A little (basic) electrical knowledge goes a long way!

[@learnelectronics]

gartmorn so many different standards worldwide, and then our friends at the Wun Hung Lo factory who don't follow any lol

[@Gemini-1]

Nice Sir. Very clear instruction

[@supersilve]

It is a pity that you did not explain when the source is more than 30v and how to hook up a separate >5v supply to power the meter. Thanks for the video and keep up the good work.

[@brentleajunction]

Am glad I've seen this video want todo on my model railway cheers Paul

[@johnnyuppal7878]

Thank You for your time and consideration for all of those people like myself who may be watching in black and white ... your post is in wonderful Technicolor !!

[@chuckholsclaw6829]

I have a model railroad that uses dcc. I don't know if you are familiar. I have a controller that has a 12v dc power supply, the controller output is 12 to 14 volts that voltage is supplied to my track. So if bought one of these, im not sure how I would hook it up exactly to read volts and amps from my track.

[@timhnartiel]

Man, I was so close to throwing this cheap thing away, until I found out it had adjusters for the inaccurate volts and amps readings. Quick question: if I use this in an older transformer & rectifier style car battery charger, will the voltage ripples affect the reading from this panel gauge? Is there anything I could do to overcome that without affecting the battery charging, such as adding a filtering capacitor to the panel meter?

[@7eventee937]

ive been trying for hours and this video was amazing i was about to go insane

[@flairpundit7960]

So I am doing a 40v power supply. Seeing as though the meter can’t handle that. I was dropping the voltage with dual resistors or voltage divider as I should call it. Is that going to effect anything going from meter - divider - load+. Thanks for any insight. Love the channel thank you. I should also add I’m using a lm317 to variate the voltage. Where would you plug that in.

[@jefflindsay42]

Good explanation, thank you. BTW, in Australia we say Ammeter, not Amp meter 👍

[@tomiprimera5797]

Gracias buddy, you saved us money and time..

[@wilsonross6593]

Hi can you put one of these on a gasless mig welder with a high and low setting so it is more control

[@tedhancock68]

Banggood now supplies the wiring diagram but, frankly, I didn't trust it. I chose the independent power source option, afraid that the amps would include powering the meter. In any case, thanks for demonstrating that it works. This was very helpful.

[@precepts8893]

I have a simple set up, a 200 watts wind turbine, the regulator that comes with the turbine, two 6v batteries in series to get 12volts, and a power inverter charge controller that connects to the batteries with small jumper cables that come with the inverter. My question is how do I connect my similar looking volt amp meter to keep track of the battery voltage and the amount of amps the inverter is using? I don't know if a shunt is necessary, but I do have one.

[@scottwight5435]

Hi Paul! Great explanation Thankyou. Is there a way to monitor the current on multiple loads at once? in my campervan I am trying set this unit up to monitor the 12v Fridge, 12v lights and occasionally a 12v to 230v inverter , everything runs from the second aux battery through a fuse block then out to the loads . Thanks in advance

[@fryloc359]

I'm working on something that has separate volt and amp meters, and apparently you can;'t use the same power supply for both. I wonder if this would work for my application?

[@Nathan1975Liggy]

I am a bit dim or strugling to understand. I have a meanwell type 12v PSU I want to add this to, so do I put a thin RED and Yellow and Thick black together on the PSU 12V output . Then thin black and thick RED to the PSU negative output

[@roberthatcher2773]

Great explanation, thanks! Complies with 'Ohms Law' - Voltmeter in Parallel, Ammeter in Series.

[@PPRRPelt]

Set the thing up correctly and was breaking my head over it for days (no technician by any means, just as a hobby) and then it struck me: the damn thing requires 4 volts! Nice tutorial you have, covers most of what you can do with it. the display can function with or without power source depending on how you set it up. a question though: what do you call that white plastic the light automotive bulb is placed on? looks way more convenient than just tying wires together.

[@kimbo1961]

breadboard

[@_crazytechz]

Nice video helpful Thanks sir

[@Kostanj42]

i don't quite see the problem there, black current wire goes to ground. if i got it right, you just don't need to connect the second ground wire if using same power source?

[@severinotognoni803]

Precise and understandable for a correct connection.

[@MagicSmoke11]

So -ve of the 3 wire is NoT connected anywhere at all.!! Interesting!😊👍

[@karandikarvaibhav]

thank man ....its lots help i was thinking why my meter is not showing up amps ans for that was grd is nc thanks :)

[@ericchilton3781]

does that black wire that comes out where the sense wire comes out don't connect to anything ?

[@cri8tor]

Hi. I purchased a little step up/down power converter (LM2577S) with a little 3-digit display, much like the one you use in this video. Please consider a short review and how-to tutorial for this unit. Cheers

[@jimmynoname336]

Hi thanks for the videos they are ver helpful! Where can I get that little power supply that let's you adjust volts and amps?

[@MusicMinisterJP7]

Very good theory and practical run. I was always fond of my amp meter in my previous van. My now 05 Town and country Chrysler doesn't have one. But I would like to adapt one. Would you happen to know how to wire this type or the usual round type (which is only Amp) into a cars 12v system? Gauge will go on dash. Thx.

[@TestEric]

Thank you for your diagrams, they've helped me on many projects now.

[@chuckholsclaw6829]

I have watched this 3 times. I think I get it, would this work with a power source that uses pulse width modulation? I have researched other amp meter that work for my purpose and they are very expensive.

[@sergioramses2615]

Great video but i have a question - I got a V68 digital meter and i took it apart to see if i can modified to read the voltage on my car it suppose to read AC voltage it has a circuit board to handle the AC power but from that board there are 3 wires that go to the digital display circuit board ( positive,negative and sensor ) but between the sensor wire and the negative wire it has a electrolytic capacitor but if i just disconnect those 3 wires and hooked them to my car will it work ?

[@loony1794]

Where did you get the power supply you are using

[@46bovine]

Thanks, Dude. Good explanation.

[@learnelectronics]

You bet!

[@jaileal8806]

Super helpful. Thx for posting. Just subscribed

[@davidbergewaytogo]

Very nice video friend... Could I wire my meter up like this to monitor the output of my 75 W solar panel? The battery would be the actual panel and the load would be my battery? I tried wiring this meter up last year and fried my charge controler, so... just asking for your help before I try again? :)

[@aidanhanlon6290]

What is the current source? You use a battery for your example, in a psu would it be the transformer?

[@mohammedjaffer8522]

Very nice. Simple and easy to understand. Helped me a lot. Looking forward to more Vids. TYVM and GL :)

[@dalenassar9152]

Thanks for the great video---so many get this device wrong...quite a relief here! One thing: Have you done a video on a configuration where the the load is supplied with one other than that which supplies the meter? IOW, where we are not interested in the meter supply, but the A/V of a hefty load supply. --daLE

[@Xmukherjee]

Good instruction. Under 4V meter turns off. So need to give it dedicated 5+ Volt.

[@andrewwalsh531]

at 6:11 you stated the panel meter read .43mA vs .469mA that the psu was showing, implying a difference of only about 4mA between the two. In actuality the meter is reading out in amps, not milliamps so the comparison is between 469mA on one vs 430mA on the other, a difference of about 40mA. That's nearly a 10% discrepency , which is what I am seeing in my own testing of these units. Personally I was a little disappointed in how inaccurate the current readings are, even despite their low cost. The three I have all are showing the same behavior, so they do appear to be consistent from unit to unit.

[@andrewwalsh531]

I see that the issue was already mentioned once I read further down the comments, as Maxwell Smart was fond of saying....sorry about that :) I also reworked my test setup , using a separate 9V (isolated) supply for the panel meter itself & the results are much more to my liking. The discrepancy between my bench ammeter & the panel meter now only around 2%, more than acceptable imo considering the cost tradeoff.

[@ethancass6885]

What about the black wire in the set of 3, does that just connect to nothing??

[@beaverkilr]

@learnelectronics Hi, I have one of these with a 200 amp shunt and I have tried and tried but can't figure out how to hook it up to read how much amperage my alternator is putting out in real time, I'm not wanting to know how much my amp draw is on my vehicle just the alt. output. I'm just not good with electronics.

[@pmacgowan]

Thanks ... be lost without you

[@rickmccaskill7888]

Thanks for the video. Totally solved my hookup issue with them.

[@NatishHD]

I have Got This (100V - 10A) Meter and i have found that 2 Adapters was written 9V and Coming 17V :D and another 13.3V and coming 6.5V. Now About Meter: You Can Use Meter Only With AC Adaptor Or Battery - To Turn on. Use Minimum 3V Maximum 12V and Maximum 1.5A. Use thin red (+) and thin black (-). thick Red - is changing Pulses thin Yellow - also changing Pulses thick Black - also changing Pulses 1) Volt measures thin Yellow and thick Black 2) Volt measures thin Yellow and thick Red 3) Amps measures thick Red and thick Black

[@jarhed6]

How does this change if you add a shunt in for high amperage applications?

[@HeritageExplorer]

Will it measure a pulse supply and enable it to be read? A pulse supply of about .2 of a second?

[@LEO-xo9cz]

Please help mine is 100a and it has no shunt. What value do I use?

[@smoke_stackz3168]

Can i add 50amp shunt to read higher current?

[@raylrodr]

I see that you're not big on answering people's questions, so, I'll ask anyone who may answer: I have the very same meter only it's rated for AC. The heavier black and red leads go in series with the load for the 10 Amps. How are the 3 thinner leads figured in? Is the control power also AC or separate source DC?

[@mrtang3136]

I wired this into the car to power my President Lincoln CB radio. I wanted to keep eye on amps and voltage to make sure i don't kill battery when parked up. Big problem i discovered was it measures on negative feed the amperage, so if i earth the CB radio out it will by pass the meter. Can't see a way to avoid this.

[@davidferguson8478]

I have the same one as well except my one has 3 thick wires could you tell me what those wires are for ?

[@ka01si09ma]

Thins should be for powering meter (display) when measuring inputs (power supply) larger than 30V. Fat ones are allways for measuring the load (red goes to plus for current, black for minus /ground. Third one is for value measuring.

[@crappyatlife]

keep getting d83 on the current measurement not sure what im doing wrong

[@calvin-7540]

WHat are those ics in the circuit? Any part number ?

[@charlie1872]

excuse my ignorance , when you refer to load, could that be a power controller for a model railway ?

[@learnelectronics]

Yep it sure can!

[@mojo8211]

Very clear thanks👍

[@jstagzsr]

im having a major issue right now with this meter.. i have it all hookup up in the psu case. i have everything completely done, BESIDES 2 wires.. if i hook it up the way it is supposed to be, bot the black and red wires for current will both be hooked up to the same thing.. because i am trying to put this in a circuit that measures the output of the psu.. There is no separate power supply. the power supply ISSSS the load.. so is this just not possible? ive seen it done but for some reason i can not find it anywhere online now that im actually hooking everything up.. HELP!!!!!!!!!!!

[@ogairbender808]

I would've never figured this out without you buddy,and would like to think I'm pretty savy, LoL oh yeah I subscribed brother.

[@centaur188]

Super, these things are so complicated in there simplicity if you know what I mean, in many tutorials they say don´t connect the ground wire.

[@huypt7739]

Connecting the amp meter wires in series with source will blow up meter for high current

[@mirriulahwaterdog]

Got any idea mate if there is a surface mounting block for this meter please

[@keithking1985]

How do you set it up if you were to use it In your own DIY power supply????

[@MrLosttheplot]

great video, thank you

[@concordroofer1073]

Great video. I would like to hook up a volt/amp meter to my kayak trolling motor. some of the vids either mention or show a shunt has to be used. Does this meter have to have a shunt or is it built in? Or do I even need it "electrical/electronic challenged here" LOL

[@learnelectronics]

It has a shunt built in.

[@concordroofer1073]

@@learnelectronics thank you for your reply and this vid. ken in Oakley ca

[@TheStraykiwi]

OMG thank you so much, worked like a charm!

[@rogerbrowne5514]

where did you get the power from to go to the voltage input wire which is with the yellow wire? Regards Roger.

[@rogerbrowne5514]

I have a power supply which has a reversing switch on it would this work on this meter it would be reversing the power to the meter some times? Regards Roger

[@yambo59]

Per my diatribe below, does it require a different diagram to use this display with the bangood power supply kit you built-? Seems like it might not power the display from zero output, do I have to hook the led panel up separately to my transformer power source instead of the power supply boards output or--???? Thanks, Mike

[@DeamondHunter]

maan thanks dude i was connecting the amp black and red to positive and negative like if it was the volmeter

[@marvinmoss8127]

I want to measure down to 1 volt and need to separate the measuring part and LED's and the actual input pin to the voltmeter. Where and how can I separate these two lines?

[@markliles4113]

Hello, how would you go about wiring the ebay red & blue panel meter so that with a 24 volt power source to be able to show the voltage from the 24 volt power source But also show the load from the same 24 volt battery?